Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since February 10, 2026.
CVE-2026-21514
Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability
Added to KEV February 10, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-21514
- CWE
- CWE-807
- Affected products
- Office · Microsoft Office · Microsoft
What happened
Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker to elevate privileges locally.
What it means for your business
Microsoft Office is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-21514). Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker to elevate privileges locally. CISA remediation due date: 2026-03-03. If you need help checking exposure, call (864) 335-9223.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: March 3, 2026
Sources
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